/*
 * Created on Oct 28, 2005
 * Created by Alon Rohter
 * Copyright (C) Azureus Software, Inc, All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 */
package com.aelitis.azureus.core.networkmanager.impl.tcp;

import java.io.IOException;
import java.net.InetSocketAddress;
import java.nio.ByteBuffer;
import java.nio.channels.SocketChannel;

import com.aelitis.azureus.core.networkmanager.EventWaiter;
import com.aelitis.azureus.core.networkmanager.NetworkConnection;
import com.aelitis.azureus.core.networkmanager.ProtocolEndpoint;
import com.aelitis.azureus.core.networkmanager.Transport;
import com.aelitis.azureus.core.networkmanager.TransportEndpoint;
import com.aelitis.azureus.core.networkmanager.TransportStartpoint;
import com.aelitis.azureus.core.networkmanager.impl.TransportHelperFilter;

/**
 * This class is essentially a socket channel wrapper to support working with az message encoders/decoders.
 */
public class LightweightTCPTransport implements Transport {

    private final TransportStartpointTCP transport_startpoint;
    private final TransportEndpointTCP transport_endpoint;
    private final TransportHelperFilter filter;

    public LightweightTCPTransport(ProtocolEndpoint pe, TransportHelperFilter filter) {
        SocketChannel channel = ((TCPTransportHelper) filter.getHelper()).getSocketChannel();
        transport_endpoint = new TransportEndpointTCP(pe, channel);
        transport_startpoint = new TransportStartpointTCP(transport_endpoint);

        this.filter = filter;
    }

    public TransportEndpoint getTransportEndpoint() {
        return (transport_endpoint);
    }

    public TransportStartpoint getTransportStartpoint() {
        return (transport_startpoint);
    }

    public long write(ByteBuffer[] buffers, int array_offset, int length) throws IOException {
        return filter.write(buffers, array_offset, length);
    }

    public long read(ByteBuffer[] buffers, int array_offset, int length) throws IOException {
        return filter.read(buffers, array_offset, length);
    }

    public SocketChannel getSocketChannel() {
        return ((TCPTransportHelper) filter.getHelper()).getSocketChannel();
    }

    public InetSocketAddress getRemoteAddress() {
        return (new InetSocketAddress(getSocketChannel().socket().getInetAddress(), getSocketChannel().socket().getPort()));
    }

    public String getDescription() {
        return getSocketChannel().socket().getInetAddress().getHostAddress() + ": " + getSocketChannel().socket().getPort();
    }

    public void close(String reason) {
        try {
            getSocketChannel().close(); // close() can block
        } catch (Throwable t) {
            t.printStackTrace();
        }
    }

    public int getMssSize() {
        return (TCPNetworkManager.getTcpMssSize());
    }

    public void setAlreadyRead(ByteBuffer bytes_already_read) {
        throw new RuntimeException("not implemented");
    }

    public boolean isReadyForWrite(EventWaiter waiter) {
        throw new RuntimeException("not implemented");
    }

    public long isReadyForRead(EventWaiter waiter) {
        throw new RuntimeException("not implemented");
    }

    public void setReadyForRead() {
        throw new RuntimeException("not implemented");
    }

    public void connectOutbound(ByteBuffer initial_data, ConnectListener listener, int priority) {
        throw new RuntimeException("not implemented");
    }

    public void connectedInbound() {
        throw new RuntimeException("not implemented");
    }

    public void setTransportMode(int mode) {
        throw new RuntimeException("not implemented");
    }

    public int getTransportMode() {
        throw new RuntimeException("not implemented");
    }

    public void setTrace(boolean on) {
        // TODO Auto-generated method stub

    }

    public String getEncryption(boolean verbose) {
        return (filter.getName(verbose));
    }

    public boolean isEncrypted() {
        return (filter.isEncrypted());
    }

    public boolean isTCP() {
        return true;
    }

    public boolean isSOCKS() {
        return (false);
    };

    public String getProtocol() {
        return "TCP";
    }

    public void bindConnection(NetworkConnection connection) {
    }

    public void unbindConnection(NetworkConnection connection) {
    }
}
